.problem_main ul{
    padding: 0 10px;
    line-height: 55px;
}

.problem_main ul li{
    height: 55px;
    border-bottom: 1px solid #cccccc;
    color: #666;
    position: relative;
}
.problem_main ul li a{
    display: inline-block;
    width: 100%;
    height: 100%;
    color: #666;
}
.problem_main ul li span{
    position: absolute;
    top: 0px;
    right: 10px;
    font-weight: 100;
    color: royalblue;
}